wx-jssign

微信js-sdk网页签名，支持express和koa-generator调用

后端调用,需要redis模块用于缓存access_token

var WxSignPackage = require("wx-jssign");
var opts = {
  appid: "appid",
  secret: "secret",
  token: "公众号token",
  access_token_prefix: "access_token_prefix_",//缓存access_token得前缀key
  jsticket_prefix: "jsticket_prefix_",
  redis_auth: "redis密码",
  redis_host: "redis地址",
  redis_db: "redis第几个库"
};

var wxsign = new WxSignPackage(opts);

//支持json和jsonp
var url = req.query.url;
var callback = req.query.callback || "";
wxsign.getSignPackage(url)
    .then(function(package) {
        if (callback == "") {
            res.json(package);
        }else{
            res.jsonp(package);
        }
    }, function(err) {
        res.jsonp(err);
    });